function validateFields(frm) {
	var bSubmit = true;
	var reEmail = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;	// regular expression for a valid email address
	
	if (frm.email.value == '' || !reEmail.test(frm.email.value)) {
		alert("Please enter a valid e-mail address.");
		frm.email.focus();
		bSubmit = false;
	} else if (frm.name.value == '') {
		alert("Please enter your name.");
		frm.name.focus();
		bSubmit = false;
	} else if (frm.comments.value == '') {
		alert("Please enter some comments.");
		frm.comments.focus();
		bSubmit = false;
	}
	
	return bSubmit;
}